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Genetics of Individual Fruit Weight in Eggplant (solanum Melongena L.)

A. K. M. Quamruzzaman
Horticultural Research Center, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

M. A. Goffar
Horticultural Research Center, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

M. S. Hossain
Horticultural Research Center, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

A. K. Eusuf Zai
Soil Science Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh

M. R. Ali
Entomology Department, Sher-E-Bangla Agricultural University, Dhaka, Bangladesh

Abstract/ Executive Summary:

The genetics of individual fruit weight was studied in a nine parent half diallel cross of eggplant. The mean square for both GCA and SCA were highly significant which suggests the presence of both additive and non-additive genetic variance in the population. However, higher magnitude of GCA value than SCA indicated predominance of additive genetic variance. In most of the cases, the cross between poor parents showed positive SCA effect for individual fruit weight. The estimates of better parent heterosis ranged from 0.23 to 47.77 percent and the mid parent heterosis ranged from 1.97 to 70.93 percent. Genetic components of variation analysis suggested that additive components were more important in the inheritance of individual fruit weight. Two to three pairs of genes or groups of genes are responsible for the expression of this trait. Narrow sense heritability was 62 per cent indicating probability of selection in generations. The graphical analysis also indicated wide genetic diversity among the parents.

Keywords: Genetic component, Combining ability, Heterosis, Fruit weight, Eggplant

Location: Olericulture Division of HRC, Bangladesh Agricultural Research Institute (BARl), Gazipur

Start Date: 00-00-2002

End Date: 00-00-2003

Program Area: Variety and Species

Commodity: Brinjal

Objectives:

To determine the genetics of the individual fruit weight in eggplant.

Methodology:

The experiment was conducted at the experimental field of Olericulture Division of HRC, Bangladesh Agricultural Research Institute (BARl), Gazipur, Bangladesh during the winter season of 2002-2003. The seeds of nine parents and their F₁'s (excluding reciprocals) were sown on the seedbed on 16th September 2002. Forty-five days old seedlings were transplanted in the main field on 30 October, 2002. The experiment was laid out in a RCB design with three replications. The unit plot size was 7.5 m x 0.70 m and 10 plants were accommodated in a plot with a plant spacing of 75 cm apart in single row maintaining a row to row distance of 70 cm. Data on individual fruit weight were recorded from five randomly selected plants per entry per replication. Data were analyzed.

Source of Information: The Agriculturists 2(1): 90-95 (2004) A Scientific Journal of Krishi Foundation ISSN 1729-5211

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In the present study, the parents, P1 and P9 were found to be good general combiners for individual fruit weight and may be used in a breeding programme for developing high yielding varieties. The crosses P1 x P9, P4 x P7, P6 x P9, P5 x P8 and P8 x P9 were found promising for higher individual fruit weight. The additive components of variation were found important for individual fruit weight. The genetic components of variation analysis suggested that the proportion of recessive alleles was more than that of dominant alleles in the parents. The individual fruit weight was controlled by two to three pairs of genes or groups of genes. The graphical analysis indicated wide genetic diversity among the parents.

Knowledge Management: Journal